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The Hirst GM09 Gaussmeter offers versatile measurement capabilities with support for transverse, axial, and 3D Hall probes, ensuring compatibility with a wide range of magnetic field sensing applications. It maintains backward compatibility with existing Hirst probes, allowing seamless integration with previously acquired equipment. Its compact design facilitates easy handheld operation, complemented by a responsive touchscreen interface for intuitive control. The device is powered by a rechargeable lithium-ion battery, conveniently charged through a USB-C port, delivering reliable performance in a portable form factor.
Specification
| Measurement ranges | AUTO, ±3 mT, ±30 mT, ±300 mT, ±3.000 T |
|---|---|
| Repeatability | Better than 0.5% |
| Accuracy | Better than ±1% — calibrated to standards traceable to the NPL (National Physical Laboratory, UK) |
| Resolution | 2 µT, 0.02 Gauss (Oe), 1.6 A/m |
| Colours and materials | Anodised aluminium with plastic end caps |
| Connectivity | USB-C port for charging & data retrieval (mass storage .CSV time-stamped files) |
| Dimensions / Weight | 139 × 88 × 49 mm / 390 g |
| Maximum field sensed | ±3 T (dependent on probe) |
| Measurement modes | DC (with Min & Max), AC-Peak (with AC-Peak-Max), AC-RMS (with AC-RMS-Max) |
| Number of sensors | Single channel, 1-axis sensor probe |
| Power | Li-ion 3500 mAh, USB-C chargeable — >4 hours continuous (with sleep & auto power-off) |
| Standard cable length | 1.5 m |
| Time | Real time clock with date/time — battery backup >3 years |
| Units | Tesla, Gauss, Oersted (Oe), A/m — (1 mT = 10 Gauss = 0.7967 kA/m) |
| Frequency Range | Static field (DC) and AC 10 Hz – 6 kHz |
| Display Rate | 3 readings per second |
| Display | 3.5″ multi-colour touch screen, 320 × 480 px, backlight |
| Temperature Coefficient | Better than ±0.1% of reading / °C (including probe) |
| Optimum Operating Temperature | 20 °C – 40 °C |
| Optimum Storage Temperature | 0 °C – 50 °C |